NFL rumors: Latest news from the off-season as the new league year begins

The new league year and the official start of NFL free agency doesn't begin until 4 p.m. ET on Wednesday, but several teams around the league have already made unofficial moves to help improve their rosters.

No team has been more active than the Philadelphia Eagles, who traded star running back DeMarco Murray to the Tennessee Titans, as well as cornerback Byron Maxwell and linebacker Kiko Alonso to the Miami Dolphins.

Check out the latest NFL news and rumors below.

• The Dolphins announced they signed defensive end Mario Williams. The two-year deal is worth $17 million with incentives that could increase its value to $20 million.

• The Raiders will sign linebacker Bruce Irvin once the new league year starts, reports the NFL Network’s Ian Rapoport. Oakland is also expected to sign offensive guard Kelechi Osemele.

• The Jaguars signed defensive end Malik Jackson, reports Rapoport. The six-year deal is reportedly worth $90 million with $42 million guaranteed.

• Jacksonville also signed running back Chris Ivory, reports ESPN’s Adam Schefter. The deal is worth at least $6 million per year, according to Rapoport.

• The Carolina Panthers cut defensive end Charles Johnson earlier this off-season, but he's returning to Carolina. Joe Person of the Charlotte Observerreports Johnson is taking a one-year, $3 million deal with the Panthers, turning down deals worth twice that amount.

• The Detroit Lions have found their replacement for Calvin Johnson. ESPN's Dianna Russini reports the Lions will sign wide receiver Marvin Jones.

• Though the Bengals lost Jones, they likely won't lose safety George Iloka. Schefter reports the team has reached a five-year, $30 million deal with Iloka.